Elevator-lock.



No. 873,925. PATENTED DEC. 17, 1907.

I MLDASHIELL. ELEVATOR LOOK.

APPLICATION FILED MAR. 25. 1907.

Fig 3 E \\\\\r MILTON DASHIELL, OF BALTIMORE, MARYLAND.

ELEVATOR-LOCK.

To-aZZ whom it may concern:

- Be it known that I, MILTON DAsHIELL, a

citizen of the United States, residing at Bal' timore, State of Maryland, have mvented certain new and useful Improvements in Elevator-Locks and I do hereby declare the following to beafull, clear," and exact de, Scriptionof the-invention, such as will enable others skilled in the art towhichit appertains to make and 'use'the same;

- This inventionre'lates to devices for locking the controlling lever'of an elevatorwhile the-door of ashaft is in open position so that the lever cannotb'e niovedto set'the raising or lowering mecha'nism'of itheelev'ator-in operation. q I

' Broadly speaking the: invention resides in the provision, upon the lever, of a hinged arm "which icarries a frictioneleme'ntadapted to grip the under edge oftheusualrackfemployed in connectionwiththe 'lever when the arm is rocked, thisfirocking of the arm being. had'throngh the 'instrumentality of,a system of levers and irockingarms which are actuatedby means ofaslidin trip designed to-be moved byithe elevator 51 same is slidvto open position}, While several devices of this natureiare in use,-it is essential in nearly everycase that ,the controlling 3o lever be brought to rest exactly at the middle of the segmental raok as otherwise the detent devices for holding the lever against movementwill not cooperate with the same. It isthe primary object of my invention to.

overcome this disadvantageous feature and permit of the locking of the lever at any point betweenits two motor controlling positions, I p v In'the accompanying drawings, Figure 1 1s '40 a-planjview ofjthe mechanism showing the relation of the parts carried by the elevator car and by the landing, Fig. 2 is a View in elevation of the parts of the device, the shaft door being shown'in section, and, Fig. 3 is a detail perspective viewof-a portion of the arm'which carries the friction-element of the ,device: i f I Referring more specifically to the draw' ing's there is shown an elevator car'which is indicated bythe numeral 5 and the =flo,or of a building in which the elevator car is located which floor is indicated by the numeral v6. 'There is also illustrated a shaft door 7, a controlling lever 8, and a segmental rack 9 with: which thelever is adapted to cooperate, all of \specification of Letters Patent. Application filed March 25. 1907. Sefial No. 364.465.

'wardedgefasindicated at 15. 'derstood from the above that when the door is-closed, the sliding trip 11 Will be in retracted position as shown in Fig. 1 of the aft door when the' Patented Dec. ,17, 1907.

these several parts being of the ordinary construction. Slidably' mounted upon the floor 6 at the,

edge (of the elevator shaft in a suitable bracket 10,-is a sliding trip 11 carrying spaced rollers 12' betweenwlnch a flange 13 upon the under side of the shaft door 7 is adapted topassQ This flange extends for the greater portion of itslength along the inner edge of thedoor but at the rear end of the door, the flange is turned toward the forward edge of the door as indicatedat 14 and extends for a short distance along the said for- It will be undrawings, but when the door is open, the passage of the flange between the rollers 12 will serve toshift the sliding trip'outwardly from the edge of the floor and in the direction of the elevatorcar. Journaled at the end of the slidingtrip is a roller 16.

- Slidably mounted in a suitable bracket 17 u on the floor of the elevator car 5 is a bar 18 w ch carries at its forward end a head 19 which is adapted to be engaged by the roller 16. when the sliding trip 11 is moved as stated above. Pivoted to the opposite end of the bar 18 is one end of a rocking bar20 which is pivoted at its middle as at 21 upon the floor 5 of 'the elevator .carandpivoted to the opp O- site end of the rocking bar 20 is a link 22 the purpose of which will be resently explained. A plate 23 is bifurcate to form spaced portions 24 between which the lever 8 is received,

there being bolts 25 engaged throu h the said ortions 24 in front and in rearo the lever or rigidly securing the plate thereon. The plate is also bifurcated to form spaced ears 26 etween Whichis pivotally received the upper end of an arm 27 which is hingedly connected at its lower end to the link 22. This arm has secured or formed upon its face which opposes the lever, a friction element in the form 'ofa block 28 having a beveled up per face 29 which face is also serrated. Uncler normal conditions the arm 27 depends in substantially parallel relation with respect to the lever but when the head 19 is engaged by the roller 16 at the time of opening the door 7,.the arm will be rocked in the direction of v the lever owing to the motion communicated throu bout the bars 18 and'20-and the ,link 22. his rocking of the arm serves to bring the serrated upper face 29 of the block 28 into frictional enga ement with-the under edge of'the'segmenta rack 9 and will serve to hold "the lever 8 against movement in either direction. ,It will be understood of course that it is not necessary, owing to the frictional engagement of the block with the rack, to bring the lever exactly to intermediate pomotor controlled position in order to. secure this locking function. A spring 30 is con nected with the rocking bar 20 and with the floor of the elevator car and serves to restore the arm to its normal position after having been rocked.

An arm 31 is pivoted as at 32 upon the guide bracket 10 and extends with one of its ends normally in the path of movement ofthe door 7. The opposite end portion of the arm 31 is of cam formation as indicated at 33 and is designed to be engaged by a roller 34 journaled u on the forward edge of theelevator car w en the car reaches the landing. This engagement of the roller. 34 with the cam portion 33 of the arm 31 serves to swin the arm so that its first mentioned end wil move out of the path of movement of the door and permit opening of the same it being understood that as the said end of' the arm normally rojects in the said path of movement of t 1e door the door cannot be opened until the arm is engaged by the roller 34 as above stated. This of course serves to hold the door closed except when the elevator car is at the landing.

What is claimed iS- 1. In a mechanism for locking the controlling levers of elevator cars, the combination with a sliding door, a controlling lever, and a segment for the lever, of an arm pivoted upon the lever, there being a-friction element 'carengage the underside of the segment when the arm is swung in the direction of the lever,

a sliding trip adapted for actuation by the movement of the door to open position, and means located in the path 'of the tri and connected with the armior swinging tl ie latter when engaged bythe tri 2. In a mechanism for lociiing the controlling levers of elevator cars,'the combination with a sliding door, a controlling lever, and a segment for the lever, of an arm (pivoted upon I the lever, there being alserrate ment carried by the arm and adapted to trio-- friction eletionally engage the under side of the segment when the arm is swung in the direction of the lever, a sliding trip adapted for actuation by. the movement of the door to 0 en position,- and means locatedin the path 0 the trip and 7 connected with the arm for swinging the latter when engaged by the trilpl.

3. In a mechanism for 100 'ng the controllin'g levers of eleva'itor cars, the combination with a sliding'door, a controlling lever, and a segment for the lever, ofan arm ivoted upon the lever, there being a serrate frictionele ment carried by the arm and adapted to frictionally engage the under side of the segment when the arm is swun in the direction of the lever, a sliding trip a apted for actuation by the movement of the door to open position, a

rocking bar, a link connecting one end of the bar and the lower end of-the arm, and a bar pivoted to the other end of the rocking bar and having a cam head adapted for engagement by the trip, when the door'is open.

In testimony whereof, I'afiix my signature,

in presence of two witnesses.

- MILTON. DASHIELL, Witnesses': v

. -R. L. RAINEY, BRUCE B. Goo'rnn. 

